BioRescue, an international consortium of scientists and conservationists, succeeded in achieving the world’s first pregnancy of a rhinoceros after an embryo transfer. The southern white rhino embryo was produced in vitro from collected egg cells and sperm and transferred into a southern white rhino surrogate mother at the Ol Pejeta Conservancy in Kenya on September 24, 2023. The BioRescue team confirmed a pregnancy of 70 days with a well-developed 6.4 cm long male embryo. The successful embryo transfer and pregnancy are a proof of concept and allow us to now safely move to the transfer of northern white rhino embryos – a cornerstone in the mission to save the northern white rhino from extinction.
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